Casting Should Have Clear Outline

- Nov 01, 2017 -

The use of castings is very extensive, has been used to hardware and the entire machinery and electronics industry, and its use is becoming a growing trend. Concrete use, construction, hardware, equipment, engineering machinery and other large machinery, machine tools, ships, aerospace, automobiles, locomotives, electronics, computers, electrical appliances, lamps and other industries, many are ordinary people contact all day, Casting Parts but do not know the metal objects.

If the castings are of good quality, they should have the characteristics of clear outline, precise size, compact microstructure and fine grain.

The casting performance of the alloy is required for the structure of castings: the wall thickness of castings should be reasonable first to ensure the requirement of alloy fluidity. Then consider as far as possible not to make the casting wall thickness is too large, Casting Parts the casting thick wall should consider the shrinkage is convenient, avoid the casting shrinkage when blocked; the wall thickness of castings should be as homogeneous as possible to form shrinkage, shrinkage, coarse grains and other defects The castings should avoid large horizontal surfaces as far as possible.

Casting process to the requirements of the casting structure: avoid the shape of the living block, simplify the casting structure, reduce the type of surface, as far as possible to reduce or not use the core, Casting Parts consider the core of the fixed, venting and cleaning;

Castings are widely used in mechanical products, mainly in the following characteristics of casting methods:

1. Compared with forging, stamping, welding and powder metallurgy, the casting method can produce a complex shape, especially a blank and a part with complex inner cavity shape. such as internal combustion engine body, cylinder head, machine tool bed body, box, all kinds of pump body, boat with SRTEPC rotor and so on. Casting Parts and to the casting method to the part structure shape limit small, the casting may according to the ' force condition use the most reasonable section shape, and according to the need also may set the reinforcement reinforcement and so on, to mention. Structure strength and stiffness. If the forged steel crankshaft is changed into nodular cast iron crankshaft, the structural strength and stiffness of the cast crankshaft can be increased by changing the structure of the Chisi, uranium hole and other parts.

Under certain conditions, the structure of the parts can be made more reasonable by using special casting, inlay casting, double gold casting, small channel casting technology and casting and welding structure. Casting Parts These methods can also be used to solve some difficult problems in other metal forming methods to achieve better technical and economic results. For example, because of the development of jet engines, Casting Parts it is required to manufacture high temperature alloy parts, such as turbine blades, that are accurate in size, complex in shape and difficult to be machined or even finished without cutting, and work at high temperatures above 1000^. For this kind of parts with small complex inner cavity using the method of investment casting and ceramic core, it can not only solve the problem of machining difficulty or can not be processed, but also can improve the passing rate of parts and save the high quality alloy materials.

Casting method can be used to produce various materials and sizes of castings. At present, the commonly used metal in industry can be cast, and some gold materials, Casting Parts such as the use of very extensive cast iron, can only be formed by casting methods. The size of the castings can be produced from small to several grams of instrument parts to 200 or 300 tons of metallurgical mines and power equipment heavy castings.

The cost of castings is generally lower. This is because the foundry used raw materials are relatively inexpensive, a wide range of sources, Casting Parts but also directly using the scrap gold to remelting. At the same time, there is no need for expensive equipment under normal circumstances. In addition, because the shape and size of the castings are close to the final part, it can reduce the cutting work, save metal and reduce the cost of the parts.